存储按钮响应[关闭]

Question

我有我的屏幕（1,2）上的两个按钮。我希望能够存储被点击在变量哪个按钮，并添加5（如果按钮1）或减去5（如果按钮2）的总成绩。如何存储已被点击了哪个按钮？

Answer 1

var total = 0

$("#btn1").on("click", function() {
  total = total + 5;
  $("#txt1").val(total);
});

$("#btn2").on("click", function() {
  total = total - 5;
  $("#txt1").val(total);
})

body {
  background: #20262E;
  padding: 20px;
  font-family: Helvetica;
}

#banner-message {
  background: #fff;
  border-radius: 4px;
  padding: 20px;
  font-size: 25px;
  text-align: center;
  transition: all 0.2s;
  margin: 0 auto;
  width: 300px;
}

button {
  background: #0084ff;
  border: none;
  border-radius: 5px;
  padding: 8px 14px;
  font-size: 15px;
  color: #fff;
}

#banner-message.alt {
  background: #0084ff;
  color: #fff;
  margin-top: 40px;
  width: 200px;
}

#banner-message.alt button {
  background: #fff;
  color: #000;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<button id="btn1">+5</button>
<button id="btn2">-5</button>

<input type="text" value="0" id="txt1" />

https://jsfiddle.net/pzfh1m05/